Furthermore, of particularly significant interest is the relation (REF ), which shows that, although \(\Phi \)  is multi-valued, that \(\Psi \)  itself remains singe-valued. This is in stark contrast to the case of non-relativistic quantum particles where the single-valuedness of the wave function is often introduced as an additional postulate.The approach of Caticha [1]} is the exception that proves the rule. Indeed, the crux of Wallstrom's argument against Nelson's stochastic dynamics was that, once one accepts \(\Phi \)  as multi-valued, the condition that \(\Psi \)  be single-valued often appears rather ad hoc. But here our brief investigation into the matter reveals that the marriage between multi-valued \(\Phi \)  and single-valued \(\Psi \)  can, in fact, be rather natural — it follows because the azimuthal quantum number \(m\)  is already quantized by virtue of the single-valuedness of the physical field \(\chi (\vec{x})\) . Thus the ED approach to the theory of quantum scalar fields avoids the criticism levied by Wallstrom.
